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Aug 20
15m 5s

Essentials – Stimulants and Cognitive-En...

USMLE-Rx
About this episode
In this episode, we explore stimulants and cognitive-enhancing drugs, medications used to improve alertness, attention, memory, and cognition. You’ll learn how commonly used agents such as amphetamines, methylphenidate, modafinil, caffeine, donepezil, rivastigmine, galantamine, and memantine work, along with the conditions they’re used to treat. We’ll also r ... Show More
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Aug 13
Essentials – Physiology of the Renal Tubular System
Why does a patient on furosemide end up needing a potassium supplement? In this episode we walk the length of the nephron— proximal tubule, loop of Henle, distal convoluted tubule, and collecting duct—and trace exactly how each segment reabsorbs and secretes to keep sodium, water ... Show More
26m 15s
Aug 6
Essentials – Cholelithiasis and Cholecystitis
Gallstones are hardened deposits that form when substances such as cholesterol or unconjugated bilirubin become overly concentrated in bile. They vary greatly in size and often cause no symptoms, but stones that leave the gallbladder can obstruct the biliary tract and cause infla ... Show More
29m 8s
Jul 28
Essentials – Gastrointestinal Regulatory Substances
Digestion is regulated by a complex network of hormones, peptides, and neural signals. In this episode, we review the major gastrointestinal hormones, introduce several secondary regulatory peptides, and explain how the GI tract senses its luminal contents and integrates multiple ... Show More
29m 15s
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